[From the I'rocoediujr^-i of the Boston Society ot ^•alu^al History. 

 Vol. XV., Jan. 17, 1^72.] 



Descriptions of New Species of JNIarixe Moi.i.usks fhoiM 

 THE Coast of Florida. By Robert E. C. Stearns. 



Marginella (Glabella) opalina Steams. 



Sliell ovate, solid; H2,'ht to dafk ainlx-r. sonu- specimens sliowino- 

 obscure bands, more or less intense, of same color; subtransparent, 

 smooth, polished; spire elevated, apex rounded; whorls four, suture 

 distinct; aperture rather more than half the lentrth of the shell; outer 

 lip thickened, internally crenated, and strongly notehecl above; colu- 

 mella with four well developed plaits. 



Largest specimen measured lont^. .21. hit. .1 inch: 



Smallest do. do. long. .17, lat. .09 inch. 



Habitat: Rocky Point, Tampa Bay. west coast of FUn-ida, where 

 several sjiecimens were collected by Col. E. Jewett and myself; this 

 beautiful little shell was found by us upon the under side of bunches of 

 oyster shells, near low water mark. I know of no other species with 

 which it niitrht be confounded. 



